African Entomology (2013) 21, 221-230

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E.H. Shaurub, A.A. Abd El-Wahab and N.M. Abd El-Aziz (2013)
Pathogenicity, yield and DNA genome pattern of the entomopathogenic virus Spodoptera littoralis multicapsid nucleopolyhedrovirus (SpliMNPV) to Spodoptera littoralis (Boisduval) under the impact of environmental stress
African Entomology 21 (2), 221-230
Abstract: The effect of temperature, ultraviolet (UV) radiation and sunlight on the pathogenicity, yield and DNA genome pattern of the entomopathogenic virus SpliMNPV to the Egyptian cotton leafworm Spodoptera littoralis (Boisduval) was studied. The viral pathogenicity in terms of larval mortality, and yield in terms of polyhedral inclusion bodies/g larval body weight, significantly increased with the increase of temperature; with optimal temperature of 30 °C for viral yield. However, the pathogenicity significantly decreased with the increase of the exposure period, under the stress of both UV radiation and sunlight, in case of non-shielded exposed viral samples. In contrast, sunlight and UV had no significant effect on the viral pathogenicity in shielded exposed samples. The viral yield significantly decreased with the increase of the exposure period to UV radiation. The same pattern also held true for the exposure to sunlight in case of non-shielded exposed samples without using a UV filter. The viral DNA genome pattern was not affected under the stress of temperature, UV-radiation (shielded samples), sunlight using a UV filter (shielded or non-shielded samples), and sunlight without using a UV filter (shielded samples). Whereas, the intensity of the viral DNA, in non-shielded samples, decreased gradually with the increase of the exposure period to UV radiation and sunlight without using a UV filter.
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Link to article at publishers website


Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Spodoptera littoralis
Spodoptera littoralis nucleopolyhedrovirus (entomopathogen) Spodoptera littoralis